Support for circular-saw-sharpening machines



Feb. 7, 1928.;

P. C. SHIRIA SUPPORT FOR CIRCULAR SAW SHARPENING MACHINES Original Dec. 7-, 1925 mVEHTOR PETER cuumce snlllm Isv i/ 6% ATTORNEY Patented ch. 7, 1928. i i Lfi58 fi 'li lill ll l lill filthh i 'hifi PETER GLAB-N"E SHIRIA, OF POWELL RIVER, BRITISH COL UMBIA, CANADA.

SUPPURT FOR CIRCULAR-SAVf-SHARFENING MACHINES.

Application filed December 7, 1925, Serial No. 73,1 70. Renewed November 9, 1927.

My invention relates to improvements in wards beyond the saw face to prevent filings st )ports 't'or circular saw sharpening maand grit from the grinder falling upon the comes, the objects oi which are to provide spindle to such an extent as to produce unaeans whereby a circular saw may be truly due wear to the bearing surfaces. The sleeve 5 centered on a sharpening machine so that all is provided with a lieyway 14. oi lesser depth teeth may be accurately ground equidistant than the thickness of the sleeve wall. from the saw centre, whereby pro;from the Mounted upon the sleeve is a cone, generally grinding wheel is prevented from cutting indicated by the numeral 15, adapted to fit the saw' oorti'vg' means and the central the hole of the saw and having a flangelfi 10 aperture 0 he l provide means at outer end and beingaslow taper 17 whereby the saw ng means is arin ermediatc its length and a relatively quick ranged to wnli the saw as the saw is taper at its innerend. The cone :ispromoved from tooth to tooth a iiinst the vidcd with a pin 19 extending throughits grinding wheel. sidewall which is adapted to engage the 15 he invention consi, .l essentially of a lzeyway 14 so as to permit of longitudinal sleeve rotatable upon the saw spindle having ni-awemcnt of cone along the sleeve 13 a cone thereon which is adapted to enter the to provide for centering the saw thereon and central aperture of the saw and means for for bringing the inner face of the saw into holding the cone in engagement with the contact with the face of the cup 7, the en- 39 saw, as will be more fully described in the gagenient of the pin 19 with the kcyway 14 following specification, in which causes the cone 15 and the sleeve 13 to ro- Fig. 1 is a general View of a circular saw tate as a unit. sharpening machine showing part of a saw The numeral 20 indicates generally, a

in position for sharaenin sirinoclio which is Jreli'erabl formed U f u a e. E i y h1g2 1s a sectional view ot the saw sup shaped and aving a pair 0t blades 21 whlch port. are apertured as at 22, such apertures being In the drawings like characters of reterslightly lar 'er than the spindle 10 onto ence indicate corresponding parts in each which it is titted and held in position by the figure. pin 12 extending through the spindle. One

The numeral 1 indicates generally a saw blade 21 of the clip is adapted to bear upon 83 sharpener frame having an adjust-able horiand to exert a resilient pressure on the flange zontal member 2 upon which a support head. 16 ot the cone 15 to thrust it as far as the 3 is cndwise movable, Suitably positioned cone surfaces 17 and 18 will permit into the upon the frame 1 is a device a which at each hole 01" the saw 8, thereby accurately center 21:5 actuation is adapted to impart partial rotalug the saw about the spindle to the end that tion to the saw equal to the length of one the teeth 9 may all be ground equidistant tooth, and 5 is a grinder having a grinding from the saw centre. wheel which is adapted to grind the teeth it will thus be seen that l have devised a as they are moved into position thereunder. means for supporting a circular saw upon a 40 Mounted upon the support head 3 is a cup grinding machine, which is adapted to firmly 'i', see Figure 2, the face of which forms a engage the saw whereby the several parts bearing for one side face of the saw 8 to forming the support do not rotate about each hold it against transverse movement when its other, hence grit falling :lrozn the grinding teeth 9 are being ground by the wheel (3. wheel onto the cone or sleeve cannot produce Secured to the support head 8 and projectwear, which in machines of present coning through the cup 7 is a stationary spindle struction renders frequent replacement oi 10 having an aperture 11 adjacent its outer cones necessary.

end through which a removable pin 12 is What I clai as y in ntio i adapted to extend, the purpose of which will 1. In a circular saw sharpening machine,

50 hereinafter appear. a saw supporting spindle having rotat- The numeral 13 indicates a sleeve suit-ably able sleeve, a cone adjustable longitudinally held against longitudinal movement by a pin of the sleeve upon which the saw is adapted 13 and rotatably mounted upon the spinto be centered, said cone having a quick 5 die, which is of such a length as to reach entering taper and a slow engaging taper, D

to the bottom of the cup and project outmeans for preventing rotation of the cone about the sleeve and means for holding the cone in engagement with the saw.

2. In a circular saw sharpening machine, a saw supporting spindle having a rotatable sleeve, a cone adjustable longitudinally of the sleeve upon which the saw is adapted to be centered, means for preventing rotation of the cone about the sleeve, and spring means carried by the spindle adapted to exert a pressure upon the cone to hold it in driving engagement with the saw.

3. A saw supporting and clamping device for circular saw sharpening machines comprising a rotatablv mounted sleeve, a member at one end of the sleeve adapted to engage one side of a circular saw, a saw centering and supporting element slidably mounted on the sleeve to rotate therewith adapted to engage in the central orifice of the circular sawand to hold the saw to the aforesaid member and a spring arranged to press against the outer end of said centering and supporting element to hold the latter to the saw.

4 A saw supporting and clamping device for circular saw sharpening machines comprising a fixed spindle, a non-sliding sleeve rotatably mounted thereon, a member mounted on the spindle at the inner end of the sleeve and adapted to engage one side of a circular saw blade having a central orifice receiving the spindle and sleeve therethrough, a cone slidably mounted on the sleeve to turn therewith and having its outer surface siutably tapered to engage in the central orifice of the saw to support and center the latter, abutment means carried by the outer end of said spindle, and spring pressure exerting means confined in compression between said abutment means and the outer end of said cone.

Dated at Vancouver, B. (3., this 16th day of November, 1925.

PETER (LARNCE SHIRIA. 

